Field.

Item 1: https://backpack.tf/item/15855120456

Sale 1: Untrace, can't be seen on Scrap.tf bot's inv

https://backpack.tf/profiles/76561198322260385#!/compare/1750809600/1751414400

https://backpack.tf/profiles/76561198135388328#!/compare/1750982400/1751068800

Sale 2: 44 keys, 15.11 ref

https://backpack.tf/profiles/76561198135388328#!/compare/1750982400/1751068800

https://backpack.tf/profiles/76561198099121827#!/compare/1750982400/1751155200

Sale 3: 56k pure

https://backpack.tf/profiles/76561198099121827#!/compare/1751155200/1751328000

https://backpack.tf/profiles/76561198977721610#!/compare/1751068800/1751241600

Sale 4: Bulk

https://backpack.tf/profiles/76561198977721610#!/compare/1753574400/1753660800

https://backpack.tf/profiles/76561198275111844#!/compare/1753401600/1753660800

Sale 5: Bulk

https://backpack.tf/profiles/76561198275111844#!/compare/1756771200/1756857600

https://backpack.tf/profiles/76561198106511423#!/compare/1756771200/1756857600

Marketplace sales:

https://marketplace.tf/items/tf2/30862;5;u62

https://marketplace.tf/items/tf2/5021;6

$149.99 Jul 29th, key price for the day is $1.93

$149.99 / $1.93 = 77.71k

Classifieds link: https://imgur.com/a/QsbDK1P

Excluding the sales at 44 and 56 keys as outliers far below buy orders. Single sale in-date for 77.71 keys not excluded by sellers/buyers, rounding this up to 78 and taking this as the single value.